Bathrooms as public-health early warning.
Toilets and sanitation that can detect pathogens early, in the bathrooms whole communities share; public toilets, planes, venues and care settings, joined up into an early-warning layer for community health.
Readiness · SRL 1 of 9
Binding constraints · orchestration & capital
Diagnostic dated · August 2026
The case.
The science already turned once. During COVID, wastewater surveillance proved that sanitation carries early public-health signal: cities read infection curves from sewers days before clinics saw them. That evidence sits at city scale, one step removed from where people actually are.
The bathrooms communities share, public toilets, planes, stadiums, schools and care settings, are the places that signal passes through first. Detection technology able to work at room and building scale is emerging, and nobody has yet joined it up.
The movement already exists. Advocates for better public bathrooms, the open bathroom movement, have been making the access and dignity case for years. An early-warning layer gives that case a public-health engine: the same room that serves people better can also protect them sooner.
The campaign researches how those pieces connect: the technology, the operators of shared bathrooms, the advocates, and the public-health systems that would act on the signal.
How ready is the system?
We score every campaign with a System Readiness Level diagnostic, in the tradition of NASA’s Technology Readiness Levels but aimed at a whole system rather than a single product. Six levers are scored against nine levels; the weakest lever sets the system’s level, and the weakest lever is the next work.
Levels 1–3 live on the ground; 4–6 in the connective layer; 7–9 in the wider system.
The system sits at SRL 1, bound by orchestration and capital, not by technology. The research is further ahead than intuition suggests; the convening has not begun. That gap is the campaign.
Scores follow the weakest-lever rule: each lever is rated at the highest level whose conditions are fully met, with evidence, and the lowest rating sets the system’s level. Arrows show 12-month momentum. The diagnostic is a working draft (v0.1); scores are dated and revised as the work moves. The full method and matrix: the diagnostic.